US20090021432A1 - Planar inverted F antenna - Google Patents
Planar inverted F antenna Download PDFInfo
- Publication number
- US20090021432A1 US20090021432A1 US12/218,514 US21851408A US2009021432A1 US 20090021432 A1 US20090021432 A1 US 20090021432A1 US 21851408 A US21851408 A US 21851408A US 2009021432 A1 US2009021432 A1 US 2009021432A1
- Authority
- US
- United States
- Prior art keywords
- antenna
- ground surface
- planar inverted
- antenna body
- auxiliary plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
Definitions
- the present invention relates to a planar inverted F antenna, and more particularly, to a planar inverted F antenna capable of improving antenna performance by adding an auxiliary plate between a ground surface and an antenna body.
- the size of the antenna has also decreased.
- technology capable of minimizing the size of the antenna while still maintaining the same function is one of the most important technologies.
- Conventional mobile communication terminal antennas such as monopole antennas, whip antennas, helical antennas, sleeve antennas, inverted F antennas, diversity antennas, micro-strip antennas, chip antennas, twisted loop antennas, EID antennas, N-type antennas, etc., have been developed.
- Such antennas may be classified as either internal or external antennas depending on the installation position.
- External antennas include monopole antennas, whip antennas, helical antennas, sleeve antennas, N-type antennas, chip antennas, FS-FIFI antennas, etc., all of which are installed at the exterior of terminals.
- Internal antennas include inverted F antennas, planar inverted F antennas, diversity antennas, micro-strip antennas, twisted loop antennas, EID antennas, etc., all of which are installed in the interior of terminals.
- Planar antennas may be classified further as inverted F antennas, planar inverted F antennas, diversity antennas, micro-strip antennas, EID antennas, FS-FIFA antennas, RCDLA antennas, or DTSA antennas, all of which have a planar structure.
- planar inverted F antenna capable of reducing the size of the antenna and readily tuning the antenna in keeping with the slimming and miniaturization of mobile communication terminals by installing an auxiliary plate between a ground surface and an antenna body.
- a planar inverted F antenna includes: a ground surface having a finite plane and formed of a conductive material; an antenna body at a certain distance from the ground surface and transmitting and receiving radio waves; a feed line for electrically connecting the ground surface and the antenna body; a ground pin for grounding the antenna body to the ground surface; and at least one auxiliary plate disposed between the antenna body and the ground surface.
- a planar inverted F antenna includes: a ground surface having a finite plane and formed of a conductive material; an antenna body at a certain distance from the ground surface and transmitting and receiving radio waves; a feed line for electrically connecting the ground surface and the antenna body; a ground pin for grounding the antenna body to the ground surface; and at least one auxiliary plate disposed between the antenna body and the at least one auxiliary plate to be inclined with respect to the ground surface.
- a planar inverted F antenna includes: a ground surface having a finite plane and formed of a conductive material; an antenna body at a certain distance from the ground surface and transmitting and receiving radio waves; a feed line for electrically connecting the ground surface and the antenna body; a ground pin for grounding the antenna body to the ground surface; and at least one auxiliary plate disposed between the antenna body and the ground surface, a portion of which is covered by the antenna body, and the other portion of which is exposed.
- the auxiliary plate may have a width relatively smaller than, equal to, or relatively larger than that of the antenna body.
- the auxiliary plate may have a “ ⁇ ” or “T” shape.
- FIG. 1 is a perspective view of a planar inverted F antenna in accordance with a first exemplary embodiment of the present invention
- FIG. 2 is a side view of FIG. 1 ;
- FIG. 3 is a top view of FIG. 1 ;
- FIG. 4 is a graph showing the performance of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention
- FIG. 5 is a perspective view of a modified example of an auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention
- FIG. 6 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention.
- FIG. 7 is a perspective view of still another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention.
- FIG. 8 is a side view of yet another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention.
- FIG. 9 is a top view of a modified example of a feed line of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention.
- FIG. 10 is a perspective view of a planar inverted F antenna in accordance with a second exemplary embodiment of the present invention.
- FIG. 11 is a side view of FIG. 10 ;
- FIG. 12 is a top view of FIG. 10 ;
- FIG. 13 is a graph showing the performance of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention.
- FIG. 14 is a perspective view of a modified example of an auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention.
- FIG. 15 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention.
- FIG. 16 is a perspective view of a modified example of a feed line of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention.
- FIG. 17 is a perspective view of a planar inverted F antenna in accordance with a third exemplary embodiment of the present invention.
- FIG. 18 is a top view of FIG. 17 ;
- FIG. 19 is a side view of FIG. 17 ;
- FIG. 20 is a graph showing the performance of the planar inverted F antenna in accordance with the third exemplary embodiment of the present invention.
- FIGS. 1 through 20 discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged wireless communication systems.
- FIG. 1 is a perspective view of a planar inverted F antenna in accordance with a first exemplary embodiment of the present invention
- FIG. 2 is a side view of FIG. 1
- FIG. 3 is a top view of FIG. 1
- FIG. 4 is a graph showing the performance of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention.
- a planar inverted F antenna 100 in accordance with a first exemplary embodiment of the present invention includes a ground surface 110 having a finite plane and formed of a conductive material.
- the ground surface 110 is a printed circuit board.
- An antenna body 120 is horizontally installed over the ground surface 110 at a certain distance from the ground surface 110 and transmits/receives radio waves.
- a feed line 130 is vertically installed on the ground surface 110 to electrically connect the antenna body 120 to the ground surface 110 .
- a ground pin 140 is formed at an end of the antenna body 120 to ground the antenna body 120 to the ground surface 110 .
- An auxiliary plate 150 is installed between the antenna body 120 and the ground surface 110 .
- a single auxiliary plate 150 may be installed, two auxiliary plates 150 may be installed as shown in FIG. 5 , or, while not shown, three or more auxiliary plates may be installed.
- the auxiliary plate 150 may have a width w relatively smaller than that of the antenna body 120 .
- planar inverted F antenna in accordance with a first exemplary embodiment of the present invention will be described.
- the size of the antenna also is reduced in keeping with the slimming and miniaturization of mobile communication terminals and frequency is inversely proportional to the length of the antenna, design of the antenna is subjected to many restrictions.
- the planar inverted F antenna 100 in accordance with the first exemplary embodiment of the present invention can remarkably reduce the total size of the antenna at the same frequency by installing the auxiliary plate 150 between the ground surface 110 and the antenna body 120 in consideration of the above problems.
- FIG. 4 is a graph for comparing the performance of a conventional planar inverted F antenna with the performance of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention.
- the X-axis represents frequency
- the Y-axis represents standing wave ratio.
- a solid line represents an experiment value of the present invention
- a broken line represents an experiment value of the conventional art.
- the frequencies of the conventional art are 1.9322 GHz and 1.9839 GHz, respectively, and the frequencies of the present invention are 1.4945 GHz and 1.5100 GHz, respectively.
- the frequency of the present invention is reduced by about 0.4 to 0.5 GHz.
- the total size of the antenna can be remarkably reduced when the same frequency is used.
- FIG. 6 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention
- FIG. 7 is a perspective view of still another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention
- FIG. 8 is a side view of yet another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention.
- the auxiliary plate 150 may have the same width w as the antenna body 120 .
- the auxiliary plate 150 may have a width w larger than that of the antenna body 120 .
- an auxiliary plate 150 ′ may have a “T” shape.
- the feed line 130 may be located at a position corresponding to 1 ⁇ 3 of the antenna body 120 , or as shown in FIG. 9 , the feed line 130 may be located at a position corresponding to 1 ⁇ 2 of the antenna body 120 .
- FIG. 10 is a perspective view of a planar inverted F antenna in accordance with a second exemplary embodiment of the present invention
- FIG. 11 is a side view of FIG. 10
- FIG. 12 is a plan view of FIG. 10 .
- a planar inverted F antenna 200 in accordance with the second exemplary embodiment of the present invention includes a ground surface 210 having a finite plane and formed of a conductive material.
- the ground surface 210 is a printed circuit board.
- An antenna body 220 is horizontally installed over the ground surface 210 at a certain distance from the ground surface 210 and transmits/receives radio waves.
- a feed line 230 is installed on the ground surface 210 in an inclined manner to electrically connect the antenna body 220 to the ground surface 210 .
- a ground pin 240 is formed at an end of the antenna body 220 to ground the antenna body 220 to the ground surface 210 .
- An auxiliary plate 250 is installed between the antenna body 220 and the ground surface 210 in an inclined manner.
- the auxiliary plate 250 may have a width w relatively smaller than that of the antenna body 220 .
- planar inverted F antenna in accordance with the second exemplary embodiment of the present invention will be described.
- planar inverted F antenna 200 in accordance with the second exemplary embodiment of the present invention can remarkably reduce the total size of the antenna at the same frequency by installing the inclined auxiliary plate 250 between the ground surface 210 and the antenna body 220 , in consideration of the above problems.
- FIG. 13 is a graph for comparing the performance of a conventional planar inverted F antenna with the performance of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention.
- the X-axis represents frequency
- the Y-axis represents standing wave ratio.
- a solid line represents an experiment value of the present invention
- a broken line represents an experiment value of the conventional art.
- the frequencies of the conventional art are 1.9322 GHz and 1.9839 GHz, respectively, and the frequencies of the present invention are 1.3945 GHz and 1.4100 GHz, respectively.
- the total size of the antenna can be remarkably reduced when the same frequency is used, and the second exemplary embodiment has a better effect than that of the first exemplary embodiment.
- FIG. 14 is a perspective view of a modified example of an auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention
- FIG. 15 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention
- FIG. 16 is a perspective view of a modified example of a feed line of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention.
- the auxiliary plate 250 may have the same width w as the antenna body 220 .
- the auxiliary plate 250 may have a width w larger than that of the antenna body 220 .
- the feed line 230 may be located at a position corresponding to 1 ⁇ 3 of the antenna body 220 , or as shown in FIG. 16 , the feed line 230 may be located at a position corresponding to 1 ⁇ 2 of the antenna body 220 .
- FIG. 17 is a perspective view of a planar inverted F antenna in accordance with a third exemplary embodiment of the present invention
- FIG. 18 is a top view of FIG. 17
- FIG. 19 is a side view of FIG. 17 .
- a planar inverted F antenna 300 in accordance with the third exemplary embodiment of the present invention includes a ground surface 310 having a finite plane and formed of a conductive material.
- the ground surface 310 is a printed circuit board.
- An antenna body 320 is horizontally installed over the ground surface 310 at a certain distance from the ground surface 310 and transmits/receives radio waves.
- a feed line 330 is vertically installed on the ground surface 310 to electrically connect the antenna body 320 to the ground surface 310 .
- a ground pin 340 is formed at an end of the antenna body 320 to ground the antenna body 320 to the ground surface 310 .
- An auxiliary plate 350 is installed between the antenna body 320 and the ground surface 310 .
- a portion of the auxiliary plate 350 is covered by the antenna body 320 , and the other portion of the auxiliary plate 350 is exposed.
- the auxiliary plate 350 may have a width w relatively smaller than that of the antenna body 320 .
- planar inverted F antenna in accordance with the third exemplary embodiment of the present invention will be described.
- planar inverted F antenna 300 in accordance with the third exemplary embodiment of the present invention can remarkably reduce the total size of the antenna at the same frequency by installing the auxiliary plate 350 between the ground surface 310 and the antenna body 320 in consideration of the above problems.
- FIG. 20 is a graph for comparing the performance of a conventional planar inverted F antenna with the performance of the planar inverted F antenna in accordance with a third exemplary embodiment of the present invention.
- the X-axis represents frequency
- the Y-axis represents standing wave ratio.
- a solid line represents an experiment value of the present invention
- a broken line represents an experiment value of the conventional art.
- the frequencies of the conventional art are 1.9322 GHz and 1.9839 GHz, respectively, and the frequencies of the present invention are 1.2945 GHz and 1.3100 GHz, respectively.
- the total size of the antenna can be remarkably reduced when the same frequency is used, and the third exemplary embodiment has a better effect than that of the first exemplary embodiment.
- a planar inverted F antenna in accordance with the present invention can reduce the size of the antenna and readily tune the antenna in keeping with the slimming and miniaturization of mobile communication terminals by installing an auxiliary plate between a ground surface and an antenna body.
Landscapes
- Waveguide Aerials (AREA)
Abstract
Description
- The present application makes reference to and claims all benefits accruing under 35 U.S.C. §119 from an application for PLANER INVERTED F ANTENNA earlier filed in the Korean Intellectual Property Office on 16 Jul. 2007, and there duly assigned Serial No. 2007-71318.
- The present invention relates to a planar inverted F antenna, and more particularly, to a planar inverted F antenna capable of improving antenna performance by adding an auxiliary plate between a ground surface and an antenna body.
- For mobile communication terminal antennas, various models for performing the following properties have been proposed. In order to accomplish high efficiency, low loss, compact and lightweight structure, omni-directionality of radiation pattern, impedance matching for increasing radiation efficiency, packaging technology for design simplification, low cost, human body protection technology from radiation, wide bandwidth, low power consumption, improved technology appropriate to electromagnetic environment, etc., various kinds of antenna technologies have been developed.
- Along with the slimming and miniaturization of mobile communication terminals, the size of the antenna has also decreased. At this point, technology capable of minimizing the size of the antenna while still maintaining the same function is one of the most important technologies.
- Conventional mobile communication terminal antennas such as monopole antennas, whip antennas, helical antennas, sleeve antennas, inverted F antennas, diversity antennas, micro-strip antennas, chip antennas, twisted loop antennas, EID antennas, N-type antennas, etc., have been developed.
- Such antennas may be classified as either internal or external antennas depending on the installation position. External antennas include monopole antennas, whip antennas, helical antennas, sleeve antennas, N-type antennas, chip antennas, FS-FIFI antennas, etc., all of which are installed at the exterior of terminals.
- Internal antennas include inverted F antennas, planar inverted F antennas, diversity antennas, micro-strip antennas, twisted loop antennas, EID antennas, etc., all of which are installed in the interior of terminals.
- Planar antennas may be classified further as inverted F antennas, planar inverted F antennas, diversity antennas, micro-strip antennas, EID antennas, FS-FIFA antennas, RCDLA antennas, or DTSA antennas, all of which have a planar structure.
- In the conventional planar antennas, since the size of the antenna has also decreased with the slimming and miniaturization of mobile communication terminals, it is difficult to minimize the size of the antenna while still maintaining the same function.
- To address the above-discussed deficiencies of the prior art, it is a primary object of the present invention to provide a planar inverted F antenna capable of reducing the size of the antenna and readily tuning the antenna in keeping with the slimming and miniaturization of mobile communication terminals by installing an auxiliary plate between a ground surface and an antenna body.
- According to an exemplary embodiment of the present invention, a planar inverted F antenna includes: a ground surface having a finite plane and formed of a conductive material; an antenna body at a certain distance from the ground surface and transmitting and receiving radio waves; a feed line for electrically connecting the ground surface and the antenna body; a ground pin for grounding the antenna body to the ground surface; and at least one auxiliary plate disposed between the antenna body and the ground surface.
- According to another exemplary embodiment of the present invention, a planar inverted F antenna includes: a ground surface having a finite plane and formed of a conductive material; an antenna body at a certain distance from the ground surface and transmitting and receiving radio waves; a feed line for electrically connecting the ground surface and the antenna body; a ground pin for grounding the antenna body to the ground surface; and at least one auxiliary plate disposed between the antenna body and the at least one auxiliary plate to be inclined with respect to the ground surface.
- According to still another exemplary embodiment of the present invention, a planar inverted F antenna includes: a ground surface having a finite plane and formed of a conductive material; an antenna body at a certain distance from the ground surface and transmitting and receiving radio waves; a feed line for electrically connecting the ground surface and the antenna body; a ground pin for grounding the antenna body to the ground surface; and at least one auxiliary plate disposed between the antenna body and the ground surface, a portion of which is covered by the antenna body, and the other portion of which is exposed.
- Here, the auxiliary plate may have a width relatively smaller than, equal to, or relatively larger than that of the antenna body. The auxiliary plate may have a “┐” or “T” shape.
- Before undertaking the DETAILED DESCRIPTION OF THE INVENTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation; the term “or,” is inclusive, meaning and/or; the phrases “associated with” and “associated therewith,” as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like. Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases.
- For a more complete understanding of the, present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:
-
FIG. 1 is a perspective view of a planar inverted F antenna in accordance with a first exemplary embodiment of the present invention; -
FIG. 2 is a side view ofFIG. 1 ; -
FIG. 3 is a top view ofFIG. 1 ; -
FIG. 4 is a graph showing the performance of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention; -
FIG. 5 is a perspective view of a modified example of an auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention; -
FIG. 6 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention; -
FIG. 7 is a perspective view of still another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention; -
FIG. 8 is a side view of yet another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention; -
FIG. 9 is a top view of a modified example of a feed line of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention; -
FIG. 10 is a perspective view of a planar inverted F antenna in accordance with a second exemplary embodiment of the present invention; -
FIG. 11 is a side view ofFIG. 10 ; -
FIG. 12 is a top view ofFIG. 10 ; -
FIG. 13 is a graph showing the performance of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention; -
FIG. 14 is a perspective view of a modified example of an auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention; -
FIG. 15 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention; -
FIG. 16 is a perspective view of a modified example of a feed line of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention; -
FIG. 17 is a perspective view of a planar inverted F antenna in accordance with a third exemplary embodiment of the present invention; -
FIG. 18 is a top view ofFIG. 17 ; -
FIG. 19 is a side view ofFIG. 17 ; and -
FIG. 20 is a graph showing the performance of the planar inverted F antenna in accordance with the third exemplary embodiment of the present invention. -
FIGS. 1 through 20 , discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged wireless communication systems. -
FIG. 1 is a perspective view of a planar inverted F antenna in accordance with a first exemplary embodiment of the present invention,FIG. 2 is a side view ofFIG. 1 ,FIG. 3 is a top view ofFIG. 1 , andFIG. 4 is a graph showing the performance of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention. - Referring to
FIGS. 1 to 3 , a planar invertedF antenna 100 in accordance with a first exemplary embodiment of the present invention includes aground surface 110 having a finite plane and formed of a conductive material. - Here, conventionally, the
ground surface 110 is a printed circuit board. Anantenna body 120 is horizontally installed over theground surface 110 at a certain distance from theground surface 110 and transmits/receives radio waves. - A
feed line 130 is vertically installed on theground surface 110 to electrically connect theantenna body 120 to theground surface 110. - A
ground pin 140 is formed at an end of theantenna body 120 to ground theantenna body 120 to theground surface 110. - An
auxiliary plate 150 is installed between theantenna body 120 and theground surface 110. - A single
auxiliary plate 150 may be installed, twoauxiliary plates 150 may be installed as shown inFIG. 5 , or, while not shown, three or more auxiliary plates may be installed. - The
auxiliary plate 150 may have a width w relatively smaller than that of theantenna body 120. - Hereinafter, operation of the planar inverted F antenna in accordance with a first exemplary embodiment of the present invention will be described.
- Because the size of the antenna also is reduced in keeping with the slimming and miniaturization of mobile communication terminals and frequency is inversely proportional to the length of the antenna, design of the antenna is subjected to many restrictions.
- The planar inverted
F antenna 100 in accordance with the first exemplary embodiment of the present invention can remarkably reduce the total size of the antenna at the same frequency by installing theauxiliary plate 150 between theground surface 110 and theantenna body 120 in consideration of the above problems. - Therefore, in keeping with the slimming and miniaturization of mobile communication terminals, it is possible to design a smaller antenna.
-
FIG. 4 is a graph for comparing the performance of a conventional planar inverted F antenna with the performance of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention. - In the graph of
FIG. 4 , the X-axis represents frequency, and the Y-axis represents standing wave ratio. A solid line represents an experiment value of the present invention, and a broken line represents an experiment value of the conventional art. - As a result of measuring frequencies of arbitrary points around a standing wave ratio of −15 dB to −12 dB, the frequencies of the conventional art are 1.9322 GHz and 1.9839 GHz, respectively, and the frequencies of the present invention are 1.4945 GHz and 1.5100 GHz, respectively.
- Comparing the present invention with the conventional art in this graph, it will be appreciated that the frequency of the present invention is reduced by about 0.4 to 0.5 GHz. Considering the inverse relationship between frequency and antenna size, it will be appreciated that the total size of the antenna can be remarkably reduced when the same frequency is used.
-
FIG. 6 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention,FIG. 7 is a perspective view of still another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention, andFIG. 8 is a side view of yet another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the first exemplary embodiment of the present invention. - First, as shown in
FIG. 6 , in the planarinverted F antenna 100 in accordance with the first exemplary embodiment of the present invention, theauxiliary plate 150 may have the same width w as theantenna body 120. - In addition, as shown in
FIG. 7 , in the planarinverted F antenna 100 in accordance with the first exemplary embodiment of the present invention, theauxiliary plate 150 may have a width w larger than that of theantenna body 120. - As shown in
FIGS. 6 and 7 , when the widths w of theauxiliary plate 150 and theantenna body 120 have various ratios, it is possible to more readily perform a tuning process depending on design conditions of the mobile communication terminals. - In addition, as shown in
FIG. 8 , anauxiliary plate 150′ may have a “T” shape. - Further, as shown in
FIG. 2 , thefeed line 130 may be located at a position corresponding to ⅓ of theantenna body 120, or as shown inFIG. 9 , thefeed line 130 may be located at a position corresponding to ½ of theantenna body 120. - Meanwhile,
FIG. 10 is a perspective view of a planar inverted F antenna in accordance with a second exemplary embodiment of the present invention,FIG. 11 is a side view ofFIG. 10 , andFIG. 12 is a plan view ofFIG. 10 . - Referring to
FIGS. 10 to 12 , a planarinverted F antenna 200 in accordance with the second exemplary embodiment of the present invention includes aground surface 210 having a finite plane and formed of a conductive material. - Here, conventionally, the
ground surface 210 is a printed circuit board. Anantenna body 220 is horizontally installed over theground surface 210 at a certain distance from theground surface 210 and transmits/receives radio waves. - A
feed line 230 is installed on theground surface 210 in an inclined manner to electrically connect theantenna body 220 to theground surface 210. - A
ground pin 240 is formed at an end of theantenna body 220 to ground theantenna body 220 to theground surface 210. - An
auxiliary plate 250 is installed between theantenna body 220 and theground surface 210 in an inclined manner. - The
auxiliary plate 250 may have a width w relatively smaller than that of theantenna body 220. - Hereinafter, operation of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention will be described.
- The planar
inverted F antenna 200 in accordance with the second exemplary embodiment of the present invention can remarkably reduce the total size of the antenna at the same frequency by installing the inclinedauxiliary plate 250 between theground surface 210 and theantenna body 220, in consideration of the above problems. - Therefore, in keeping with the slimming and miniaturization of mobile communication terminals, it is possible to design a smaller antenna.
-
FIG. 13 is a graph for comparing the performance of a conventional planar inverted F antenna with the performance of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention. - In the graph of
FIG. 13 , the X-axis represents frequency, and the Y-axis represents standing wave ratio. A solid line represents an experiment value of the present invention, and a broken line represents an experiment value of the conventional art. - As a result of measuring frequencies of arbitrary points around a standing wave ratio of −15 dB to −12 dB, the frequencies of the conventional art are 1.9322 GHz and 1.9839 GHz, respectively, and the frequencies of the present invention are 1.3945 GHz and 1.4100 GHz, respectively.
- Comparing the present invention with the conventional art in this graph, it will be appreciated that the frequency of the present invention is reduced by about 0.5 to 0.6 GHz.
- Considering the inverse relationship between frequency and antenna size, it will be appreciated that the total size of the antenna can be remarkably reduced when the same frequency is used, and the second exemplary embodiment has a better effect than that of the first exemplary embodiment.
-
FIG. 14 is a perspective view of a modified example of an auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention,FIG. 15 is a perspective view of another modified example of the auxiliary plate of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention, andFIG. 16 is a perspective view of a modified example of a feed line of the planar inverted F antenna in accordance with the second exemplary embodiment of the present invention. - First, as shown in
FIG. 14 , in the planarinverted F antenna 200 in accordance with the second exemplary embodiment of the present invention, theauxiliary plate 250 may have the same width w as theantenna body 220. - In addition, as shown in
FIG. 15 , in the planarinverted F antenna 200 in accordance with the second exemplary embodiment of the present invention, theauxiliary plate 250 may have a width w larger than that of theantenna body 220. - Further, as shown in
FIG. 12 , thefeed line 230 may be located at a position corresponding to ⅓ of theantenna body 220, or as shown inFIG. 16 , thefeed line 230 may be located at a position corresponding to ½ of theantenna body 220. -
FIG. 17 is a perspective view of a planar inverted F antenna in accordance with a third exemplary embodiment of the present invention,FIG. 18 is a top view ofFIG. 17 , andFIG. 19 is a side view ofFIG. 17 . - Referring to
FIGS. 17 to 19 , a planarinverted F antenna 300 in accordance with the third exemplary embodiment of the present invention includes aground surface 310 having a finite plane and formed of a conductive material. - Here, conventionally, the
ground surface 310 is a printed circuit board. Anantenna body 320 is horizontally installed over theground surface 310 at a certain distance from theground surface 310 and transmits/receives radio waves. - A
feed line 330 is vertically installed on theground surface 310 to electrically connect theantenna body 320 to theground surface 310. - A
ground pin 340 is formed at an end of theantenna body 320 to ground theantenna body 320 to theground surface 310. - An
auxiliary plate 350 is installed between theantenna body 320 and theground surface 310. - A portion of the
auxiliary plate 350 is covered by theantenna body 320, and the other portion of theauxiliary plate 350 is exposed. - The
auxiliary plate 350 may have a width w relatively smaller than that of theantenna body 320. - Hereinafter, operation of the planar inverted F antenna in accordance with the third exemplary embodiment of the present invention will be described.
- The planar
inverted F antenna 300 in accordance with the third exemplary embodiment of the present invention can remarkably reduce the total size of the antenna at the same frequency by installing theauxiliary plate 350 between theground surface 310 and theantenna body 320 in consideration of the above problems. - Therefore, in keeping with the slimming and miniaturization of mobile communication terminals, it is possible to design a smaller antenna.
-
FIG. 20 is a graph for comparing the performance of a conventional planar inverted F antenna with the performance of the planar inverted F antenna in accordance with a third exemplary embodiment of the present invention. - In the graph of
FIG. 20 , the X-axis represents frequency, and the Y-axis represents standing wave ratio. A solid line represents an experiment value of the present invention, and a broken line represents an experiment value of the conventional art. - As a result of measuring frequencies of arbitrary points around a standing wave ratio of −15 dB to −12 dB, the frequencies of the conventional art are 1.9322 GHz and 1.9839 GHz, respectively, and the frequencies of the present invention are 1.2945 GHz and 1.3100 GHz, respectively.
- Comparing the present invention with the conventional art in this graph, it will be appreciated that the frequency of the present invention is reduced by about 0.6 to 0.7 GHz.
- Considering the inverse relationship between frequency and antenna size, it will be appreciated that the total size of the antenna can be remarkably reduced when the same frequency is used, and the third exemplary embodiment has a better effect than that of the first exemplary embodiment.
- As can be seen from the foregoing, a planar inverted F antenna in accordance with the present invention can reduce the size of the antenna and readily tune the antenna in keeping with the slimming and miniaturization of mobile communication terminals by installing an auxiliary plate between a ground surface and an antenna body.
- Accordingly, in keeping with the slimming and miniaturization of the mobile communication terminals, it is possible to remarkably reduce the size of the antenna at the same frequency.
- Although the present disclosure has been described with an exemplary embodiment, various changes and modifications may be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims.
Claims (20)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070071318A KR101323853B1 (en) | 2007-07-16 | 2007-07-16 | Planar Inverted F Antenna |
KR10-2007-0071318 | 2007-07-16 | ||
KR2007-0071318 | 2007-07-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20090021432A1 true US20090021432A1 (en) | 2009-01-22 |
US9000983B2 US9000983B2 (en) | 2015-04-07 |
Family
ID=40264425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/218,514 Expired - Fee Related US9000983B2 (en) | 2007-07-16 | 2008-07-16 | Planar inverted F antenna |
Country Status (2)
Country | Link |
---|---|
US (1) | US9000983B2 (en) |
KR (1) | KR101323853B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150201551A1 (en) * | 2012-06-29 | 2015-07-23 | Tsubakimoto Chain Co. | Transplanting Device and Transplanting Method |
CN109904589A (en) * | 2018-11-09 | 2019-06-18 | 美律电子(深圳)有限公司 | Wireless communication module |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10135125B2 (en) | 2012-12-05 | 2018-11-20 | Samsung Electronics Co., Ltd. | Ultra-wideband (UWB) antenna |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4907006A (en) * | 1988-03-10 | 1990-03-06 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Wide band antenna for mobile communications |
US6650294B2 (en) * | 2001-11-26 | 2003-11-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Compact broadband antenna |
US6897814B2 (en) * | 2000-11-22 | 2005-05-24 | Matsushita Electric Industrial Co., Ltd. | Mobile radio |
US20050140554A1 (en) * | 2003-12-24 | 2005-06-30 | Nokia Corporation | Antenna for mobile communication terminals |
US20060066488A1 (en) * | 2003-01-17 | 2006-03-30 | Ying Zhinong | Antenna |
US20080001829A1 (en) * | 2006-06-30 | 2008-01-03 | Nokia Corporation | Mechanically tunable antenna for communication devices |
US20080055160A1 (en) * | 2006-08-29 | 2008-03-06 | Samsung Electronics Co., Ltd. | Dual-band inverted F antenna reducing SAR |
US7486245B2 (en) * | 2005-12-16 | 2009-02-03 | Samsung Electronics Co., Ltd. | Mobile terminal with plural antennas |
US7848771B2 (en) * | 2003-05-14 | 2010-12-07 | Nxp B.V. | Wireless terminals |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20060035999A (en) * | 2004-10-23 | 2006-04-27 | 엘지전자 주식회사 | Inner-type antenna for mobile phone |
-
2007
- 2007-07-16 KR KR1020070071318A patent/KR101323853B1/en not_active IP Right Cessation
-
2008
- 2008-07-16 US US12/218,514 patent/US9000983B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4907006A (en) * | 1988-03-10 | 1990-03-06 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Wide band antenna for mobile communications |
US6897814B2 (en) * | 2000-11-22 | 2005-05-24 | Matsushita Electric Industrial Co., Ltd. | Mobile radio |
US6650294B2 (en) * | 2001-11-26 | 2003-11-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Compact broadband antenna |
US20060066488A1 (en) * | 2003-01-17 | 2006-03-30 | Ying Zhinong | Antenna |
US7848771B2 (en) * | 2003-05-14 | 2010-12-07 | Nxp B.V. | Wireless terminals |
US20050140554A1 (en) * | 2003-12-24 | 2005-06-30 | Nokia Corporation | Antenna for mobile communication terminals |
US7486245B2 (en) * | 2005-12-16 | 2009-02-03 | Samsung Electronics Co., Ltd. | Mobile terminal with plural antennas |
US20080001829A1 (en) * | 2006-06-30 | 2008-01-03 | Nokia Corporation | Mechanically tunable antenna for communication devices |
US20080055160A1 (en) * | 2006-08-29 | 2008-03-06 | Samsung Electronics Co., Ltd. | Dual-band inverted F antenna reducing SAR |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150201551A1 (en) * | 2012-06-29 | 2015-07-23 | Tsubakimoto Chain Co. | Transplanting Device and Transplanting Method |
CN109904589A (en) * | 2018-11-09 | 2019-06-18 | 美律电子(深圳)有限公司 | Wireless communication module |
Also Published As
Publication number | Publication date |
---|---|
KR101323853B1 (en) | 2013-10-31 |
KR20090008031A (en) | 2009-01-21 |
US9000983B2 (en) | 2015-04-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7564413B2 (en) | Multi-band antenna and mobile communication terminal having the same | |
US7557760B2 (en) | Inverted-F antenna and mobile communication terminal using the same | |
US7319431B2 (en) | Surface mount antenna apparatus having triple land structure | |
US7453402B2 (en) | Miniature balanced antenna with differential feed | |
US7193566B2 (en) | Planar monopole antennas | |
US7659866B1 (en) | Multiple frequency band antenna | |
US9905912B2 (en) | Antenna module | |
CN112467357A (en) | Antenna structure | |
US7212171B2 (en) | Dipole antenna | |
CN108539366B (en) | Antenna structure | |
US20070013588A1 (en) | Broadband antenna | |
US6697023B1 (en) | Built-in multi-band mobile phone antenna with meandering conductive portions | |
CN107591619B (en) | Mobile device | |
US11329382B1 (en) | Antenna structure | |
KR20070098098A (en) | Antenna | |
US9000983B2 (en) | Planar inverted F antenna | |
US8274435B2 (en) | Antenna apparatus | |
JP2007135212A (en) | Multiband antenna apparatus | |
US20100253580A1 (en) | Printed antenna and electronic device employing the same | |
KR20020065811A (en) | Printed slot microstrip antenna with EM coupling feed system | |
US6618015B2 (en) | Antenna for use with radio device | |
CN111725609B (en) | Antenna structure | |
US11011855B2 (en) | Antenna system | |
US10833418B2 (en) | Antenna structure | |
JP2004120519A (en) | Antenna for portable radio equipment |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, SEON-JUN;SEOL, DONG-BEOM;REEL/FRAME:021303/0987 Effective date: 20080625 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20230407 |